ARM: smp_twd: add runtime registration support

Add support for the new registration interface to smp_twd.
Platforms can populate a struct twd_local_timer with MMIO
and IRQ resources, and then call twd_local_timer_register()
to have the timer registered with the core.

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>

1 files changed, 17 insertions, 1 deletions

diff --git a/arch/arm/include/asm/smp_twd.h b/arch/arm/include/asm/smp_twd.h
index bf8449da480..16c89b793f9 100644
--- a/arch/arm/include/asm/smp_twd.h
+++ b/arch/arm/include/asm/smp_twd.h
@@ -18,10 +18,26 @@
 #define TWD_TIMER_CONTROL_PERIODIC      (1 << 1)
 #define TWD_TIMER_CONTROL_IT_ENABLE     (1 << 2)
 
+#include <linux/ioport.h>
+
 struct clock_event_device;
 
 extern void __iomem *twd_base;
 
-void twd_timer_setup(struct clock_event_device *);
+int twd_timer_setup(struct clock_event_device *);
+
+struct twd_local_timer {
+        struct resource res[2];
+};
+
+#define DEFINE_TWD_LOCAL_TIMER(name,base,irq)   \
+struct twd_local_timer name __initdata = {      \
+        .res    = {                             \
+                DEFINE_RES_MEM(base, 0x10),     \
+                DEFINE_RES_IRQ(irq),            \
+        },                                      \
+};
+
+int twd_local_timer_register(struct twd_local_timer *);
 
 #endif